Mordant for dyeing



CHARLES T. BAZIN, OF LOWELL, MASSACHUSETTS.

MORDANT FOR DYEING.

SPECIFICATION forming part of Letters Patent No. 392,659, dated November 13, 1888. Application filed March 31,1888. Serial No. 209,093. (No specimens.)

To all whom it may concern:

Be it known that I, CHARLES T. BAZIN, a citizen of the United States, residing at Lowell, in the county of Middlesex and Commonwealth of Massachusetts, have invented acertain new and useful Preparation or Mordant for Dyeing, of which the following is a specification.

My improvement relates toa new and improved mordant or base for dyeing; and it consists of a solution through which the goods pass before being placed in the dye-bathproper.

In the ordinary process of dyeing, for example, a warp an indigo blue, the warp is run through a bath of boiling Water and from there passes to the dye-vat. This vat consists ofa rectangular box aboutseven feetlong, six feet high, and three feet wide, having one, two, or even eight rolls near the bottom and an equal number abovethesurfaceofthedyeiug-liquid,sothatthe yarn of the warp passes alternately over the upper rolls and beneath the lower rolls, whereby the solution is at all times when in use stirred up, and the heavy ingredients are not allowed to settle to the bottom. The solution in this vat consists, substantially, of the following ingredients, which, however, differ somewhat with different qualities of goods: about seventy-five pounds of lime, seventy-two pounds of dissolved indigo, and twenty pounds of auxiliary to each vat of water. This solution is renewed by adding indigo, lime, and auxiliary as it becomes weak after successive runs. The warp is passed through this solution, going above and below the rolls, as described, a four-knot warp requiring about one hour and a three-kuot warp requiring about an hour and one-half to pass through once.

To allow the warp to absorb sufficient coloring-matter it is run through this vat four or five times, the number being regulated by the depth of color desired, and also by the quality of the material. I I make a solution consisting of about twenty-five pounds of finely-powdered carbonaceous material-as lamp-black, charcoal, or similar substancesuspended or carried in about two gallons of molasses or other sirup. These ingredients are boiled for about half an hour, so that they may be thoroughly incorporated, and sufficient water is added to about fill a vat of the size above described.

Previous to my invention nothing has been found which would not be injurious to the cloth or yarn which would act as a satisfactory carrier of carbonaceous substances.

In place of washing the warp in boiling water, as in the above-described process, I pass it through my solution or mordant and from that directly to the dyeing solution prepared as heretofore described, except that an inferior grade of indigo may be used with satisfactory results. By passing through my solution I am enabled to do away with the washing in boiling water before passing the warp to the dye-vat proper, and in place of giving it four or five runs through the vat I only pass it through two or three times, thus saving from two to three hours in time and from five to six pounds of indigo on each warp.

By the use of my improved mordant, as above described, I am not only able to make a saving in time andindigo, but the color produced is much superior to any produced by the methods commonly used.

Though the process of dyeing only a warp one color has been described, it will be understood that the mordant is equally well adapted to dyeing all classes of goods any of the darker colors.

I claim as my invention In the process of indigo-dyeing, a preliminary bath consisting of a carbonaceous material and a saccharine sirup, mixed in about the proportions and used as herein specified.

CHAS. T. BAZIN.

\Vitnesses:

G. H. WELLER, HERBERT It. WHITE. 

